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join_nested.result, join_nested.test:

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Added a teast case for bug #11284.
sql_select.cc:
  Fixed bug #11284.
  Optimization with empty inner table currently cannot be
  used in the case of nested outer join.
This commit is contained in:
igor@rurik.mysql.com
2005-06-15 05:56:19 -07:00
parent aeb5ab5d4c
commit 4bfe1cc843
3 changed files with 41 additions and 1 deletions
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sql/sql_select.cc
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@ -2158,7 +2158,7 @@ make_join_statistics(JOIN *join, TABLE_LIST *tables, COND *conds,
if (*s->on_expr_ref)
{
/* s is the only inner table of an outer join */
if (!table->file->records)
if (!table->file->records && !embedding)
{ // Empty table
s->dependent= 0; // Ignore LEFT JOIN depend.
set_position(join,const_count++,s,(KEYUSE*) 0);